Cutter-head.



No. 815,161. PATENTED MAR. 13, 1906.

- D. HALL.

CUTTER HEAD. I APPLICATION FILED MAY 1, 1905.

3 SHEETS-SHEET 1.

H w ha WITNESSES:

4 TTORNEYJ 3'SHEETS-SHBET 2.

PATENTED MAR. 13, 1906.

F; D. HALL. CUTTER HEAD. APPLIUATION FILED MAY 1, 1905,

INVENTOR.

WITNESSES:

' F. n. ALL. CUTTER HEAD. APPLICATION FILED KAY 1, 1905.

a sums-$112M a. 1 4 4 I A 4 A 4 4 PATENTBD MAR, I3, 190s,

/ 4 VIII,

' 4 E WITNESSES: INVENTOR,

l No. 815,161.

I i D-. ATES PATENT OFFICE.

FRANK D. HALL, or WAUKEGAN, ILLINOIS;

' CUTTElR-HEAD.

To whom it may concern:

new and useful Improvements in Cutter- Heads, of which the following isa specification.

My invention relates to certain new and useful improvements incutter-heads, and it more particularly seeks to provide a cutterhead ofthe class known in the art as dado cutter-heads, and it particularlyseeks to provide a cutter-head of this character of a very simple andcompact constructionywhich can bereadily and accurately adjusted to cutgrooves of different widths ranging from a width equal to that ofone ofthe main cutters of which is provided with a hub portionto a grooveequal in width to twice the. width of said cutters.

In its generic nature my invention includes a two-part cutter-head, eachof which parts is provided with s acing and interlocking devices soarrange that when the two] parts are superimposed on each other bysimply turning the parts on the mandrel the parts can be separated orbrought together toshift the cutters into proper correlative arrangementto cut grooves of the desired size. In its more specific nature Ininvention comprises a two-partcutter-hea each part adapted to bereceived by the mandrel, which hub portions have their adjacent facesprovided with step ed inclines, the inclines of the one part a lapted tointerlock with those of the other toward or from eac cutter-head partsbeing provided with interlocking rack portions torigidly hold the partsin their adjusted positions. 1

With other objects in view than have heretofore been enumerated theinvention also comprises certain novel construction, combination, andarrangement of parts, all of which will be first described in detail andthen specifically pointed out in the appended claims, reference beinghad to the accompanying drawings, in which Figure 1 is a perspectiveview of my inven-Ti tion. Fig. 2 is aside elevation thereof, showing theparts adjusted for cutting the narrowwidth groove. Fig. 3 is a similarview showing the parts adjusted for cutting a groove of the greatestwidth. Fig. 4 is an end eleva- .tion of the parts shown in Fig. 2looking Specification of Letters Patent.

Application'filad May 1, 1905. Serial No. 258, 332.

part to adjust the parts other and each of said i rammed March 13, 1906.

. Zthe direction of the arrow. Fig. 5 is a cross- Be it known that I,FRANK D. HALL, re-. siding at Waukegan, in the county of Lake and Stateof Illinois, have invented certain.

section on the line 5 5 of Fig. 2. Fig. 6 is a similar view on the line6 6 of Fig. 3. Fig. 7 is an end face view of one section ofthe-cutjter-head, showing the steppedinclines and !the 'rackteeth. Fig.8 is a similar View of ings, in which like letters and numerals ofreference indicate like parts in all of the figures, A designates thecutter-head, which comprises sections 1 and 10, each of which consistsof a central hub portion 2 and 12, respectively, and each of which isprovided with radial arms 3 3 and 13 13, respectively, gthose .on eachsection being arranged diametrically opposite to one another,- The arms3 3 and 13 13 are each provided on their outer face with recesses 3 3and '13? 13*, re-

spectively, to receive the side cutters 4 4 and 14 14 of the sections 1and 10, respectively.- 1 The cutters 4 4 and 14 14 are held the screwsor bolt s-4 4 and 14 14 as in place by;

shown; The arms 3 3 and 13 13 are provided The section 1'is providedwith a central =housing 8,.hav1ng a rim8 provided on its outer face withracks 0r teeth 8 8 which may I be extended entirely around the rim, asshown 'in Fig; 9, but which are preferably arranged in three groupsseparated 1 clearly shown in the form disclosed in Figs. 1, 2, and 3.

Within the housing 8 adjacent the rim 8 and on the back wall 8 thereofis a plurality of stepped inclined portions 8 8 which arediagrammaticallyshown in Fig. 10. The inclines 8 8 are preferably threein number and arrangedone hundred and twenty de- ;withbrackets 5 5 and15 15, respectively, to which the cutter-knives 6 6 and 16 1'6,respectively, are secured by the screws or bolts 7 7 O and 17 1-7. 9

- spaces, as

grees apart-around the api ial line" of the out} I ter-head. F r I 9 9designate grooves between the rim 8 of the housing 8 and the bodyportion of the arms 3 3 for a purpose presently understood.

The section 10 includes a central housing 18, having a rim 18" ofgreater diameter than the rim 8 of the section 1, which rim 18 of thesection 10 is provided on its inner face with racks or teeth 18 18 forcooperating with the racks or teeth 8 8 of the section 1, and the teeth18 18 of the section 10 may be extended entirely around the rim or theymay be arranged in three or more groups to correspond with thearrangement of the teeth on the rim 8 of the section 1. When the teethare arranged in groups of threes, each group is preferably disposed onehundred and twenty degrees around the axial line of the cutter-head.When the teeth on the rim 8 of the section 1 extend entirely around thesame, I may also extend the teeth 18 18 on the rim 18 of the section 10entirely around the same, if desired.

Within the housing 18 of the section 10 and stepped from the rim 18 andarranged on the back wall 18 of the housing 18 are a plurality ofstepped inclined portions 18 18 of similar construction to the steppedinclined portions 8 8 of the section 1, and the said inclines 18 18 arearranged oppositely to and cooperate with the inclines 8 8 of thesection 1. The inclines 18 18 of the section 10 are also preferablythree in number and arranged one hundred and twenty degrees apart, thesame as the inclines 8 8 of the section 1.

19 19 designate a space or groove between the rim 18 of the housing 18of the section 10 I and, the stepped inclines 18 18 thereof, whichgroove or space 19 is designed to receive the rim 8 of the housing 8 ina manner clearly understood by reference to the drawings, the rim 18 ofthe housing 18 of the section 1O passing into the-grooves 9 9 of thesection 1, as shown.

In Fig. 9 I have shown a slightly-modified form of my, invention inwhich the inclines 8 and 18 of the sections 1 and 10, respectively, havetheir engaging faces of plain surf ace, the adjustments being made bymeans of the teeth on the rims alone.

So far as described the manner in which my invention operates will bebest explained as follows: The sections are superimposed upon oneanother in the manner shown in Figs. 1 and 2, they being securely heldon the mandrel M by the nuts M M, as shown. When the parts are in theposition shown in Figs. 1 and 2, they are as close together as it ispossible to bring the same and will therefore cut a groove equal inwidth to the width of one cutterknife. To cut grooves of greater widththan the width of one cutter-knife,it is only necessary to loosen one ofthe nuts M on the mandrel or arborand pull the two sections apart,turning the same with respect to each other the desired distance tocause the stepped inclines to assume a relation with respect to oneanother which will hold the sections separated the desired distance, asshown in Fig. 3 and as shown in dotted lines diagrammatically in Fig.10. The nut M is then tightened and the parts will be held in position,it being understood that the rackteeth will prevent the two sectionsfrom turning on their axis, and hence prevent them from coming togetherwhen once set.

I may use the rack-teeth with smooth or plain surface inclines or I mayuse the same with stepped surface inclines, as may be found desirable.

To aid in adjusting the parts to their proper width, the outside of therims of the two sec- :tions may be provided with scale-marks S S, asshown.

From the foregoing it will be seen that I have provided a very simpleand effective construction of dado-cutter in which the parts can bereadily adjusted to cut grooves of any width ranging from the width of asingle cutter-knife to twice the width of a single cutter-knife and inwhich the parts iare so arranged that there are no washers, iscrews,bolts, or nuts on the respective head lsections to become loose or whichneed to be "manipulated in adjusting the parts.

By providing the rims with interlocking rack-teeth, as shown, shouldeither of the nuts M become slightly loosened the respective parts ofthe cutter-heads will not change their relative positions or slip aroundtheir 1 axis to separate the cutters from one another.

While I have shown and described my invention as particularly adaptedfor use as a Qdado cutter-head, yet I desire it understood that the samemay be used in connection with any cutter-head of similar constructionand used for any purpose that may be found desirable.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the complete construction,operation, and many advantages of my invention will be readily apparentto those skilled in the art to which it appertains.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. A cutter-head of the class described, comprising two sections, eachhaving radial arms to receive the cutters, means formed integrally witheach section for holding said sections at a greater or less distanceapart upon rotation of the sections respectively to gage the adjustmentof the same along the axial line of the cutter-head, the means of onesection interfitting and cooperating with the means of the othersection, substantially as shown and described.

2. A dado cutter-head comprising a pair of sections, each having a bodyportion provided with inclines on the adjacent end faces 'of thesections, the inclines of one section adapted to cooperate with those oftheother section to adjust the sections along the axial line of thecutter-head and means for holding the sections in their adjustedpositions.

termining or regulating the degree of proximity of said sections, uponthe rotation'of the sections respectively, to gage the adjust- V ment ofthe same toward or from each other along the spindle, s aid'last-enamedmeans of one section adapted to cooperate with the corresponding meansof the other section and means for locking the sections together.-

4;. A cutter-head comprising a spindle, a pair of sections, each havinga body portion provided with a bearing for receiving said spindle,each'section body portion being provided with integrally-formed meansfor determining, upon the rotation of the sections respectively, thedegree of proximity of said sections, to gage the adjustment of thesections toward or from each other along the spindle, said determiningmeans of one section adapted to cooperate with the determining means ofthe other section and means for locking the sections together, saiddetermining means being formed independent of the splndle and having nodirect connection t erewith.

5. A dado cutter-head comprising a pair of sections each having a bodyportion provided with inclines arranged in. planes crossing the plane ofrotation of the cutter head, the inclines of one section adapted tocooperate withthose of the other section, each section havingrack-teeth, the rack-teeth of one section adapted to interlock withthose of the other section to hold the sections in theiradjusted-positions, substantially as shown and described.

6. A dado-cutter comprising a pair of sec-- tions each having a bodyportion provided with stepped inclines arranged in planes crossing t eplane of rotation of the cutterhead, the inclines of one section adaptedto be engaged by the inclines of the other section to hold the sectionsspaced apart, substan-' the inclines of one section adapted to be engaedby the inclines of the other section to ho d'the sections spaced aart, and means .for locking the sections to t eir adjusted positions,substantially-as shown and described.

8. A dado cutter-head comprising a pair of sections each having a bodyportion provided with stepped inclines arranged in planes crossing theplane of rotation of the cutter, the inclines of one section adapted tobe engaged by those of the other section, each section having rackportions, the rack portions of one section adapted to interlockwiththose ofthe' other sections to hold the sections to their adjustedpositions, substantially as shown and described.

9. A cutter of the character described, comprising a pair of sectionseach having a cylindrical body portion, a plurality. of inclines withineach cylindrical body portion arranged in'planes crossing the plane ofrotation of the cutter, the inclines of one section adapted to beengaged by'those of theother section, the cylindrical wall of onesection adapted to enter that of the other section,

and means on each cylindrical wall to interlock the two sections,substantially as shown and described.

10. A cutter of the character described, comprising a pair of sectionseach having a cylindrical body portion, a plurality of in clines withineach cylindrical body portion I arranged in planes crossing the plane ofrotation of the cutter, the inclines of one section adapted, to beengaged by those of the other section, the cylindrical wall of onesection adapted toenter that of the other section, meanson eachcylindrical wall to interlock thetwo sections, saidmeans comprisingrackteeth, substantially as shown and described. 11. A dado-cuttercomprising a pair ofsections each consisting of a cylindrical bodyportion and a pair of radial arms, said radial arms havingcut-away-portions, cutters held in said cut-away portions, each of saidradial arms having an extension, cutter-knives secured'to saidextensions, each of said sections having inclines within the cylindricalbody portion arranged in planes crossing the plane of rotation of thecutter, the inclines of one section adapted to cooperate with those ofthe other section to space the sections apart, and means on theperipheral portion of each cylindrical bod portion for interlocking thesections to hold them in their adjusted positions, substantially'asshown and described.

12. A dado-cutter comprising a pair of sections each consisting of acylindrical body portion and a pair of radial arms, said radial armshaving cut-away portions, cutters held in said cut-away portions, eachof said radial arms having an extension, cutter-knives-secured to saidextensions,each of said sections having inclines within the cylindricalbody portion arranged in planes crossing the plane of rotation of thecutter, the inclines of one section adapted to cooperate with those ofthe 13. A dado-cutter comprising a pair of sections each consisting of acylindrical body portion and a pair of radial arms, said radial othersections to space the sections apart, the

arms having cut-away portions, cutters held in said cut-away portions,each of said radial arms having an extension, cutter-knives secured tosaid extensions, each of saidsections havinginclines within thecylindrical body portion arranged in planes crossing the plane ofrotation of the cutter, the inclines of one section adapted to cooperatewith those of the other sections to space the sections apart, theperipheral portions of the cylindrical body portions of each sectionbeing provided with interlocking teeth, the cylindrical body portion ofone section adapted to telescopically enter the cylindrical body portionof the other section, substantially as shown and described.

14. A dado-cutter comprising a pair of sections each consisting of acylindrical body portion and a pair of radial arms, said radial armshaving cut-away portions, cutters held in said cut-away portions, eachof said radial arms having an extension, cutter-knives secured to saidextensions, each of said sections having inclines within the cylindricalbody portion arranged in planes crossing the plane of rotation of thecutter, the inclines of one section adapted to cooperate with those ofthe other sections to space the sections apart, the peripheral portionsof the cylindrical body portions of each section being provided withinterlocking teeth, the cylindrical body portion of one section adaptedto telescopically enter the cylindrical body portion of the othersection, and scale-marks on said sections for determining theiradjustments substantially as shown and described.

15. A cutter-head of the character stated comprising two sections eachhaving radial arms to receive the cutters, each section being providedwith integrally formed inclined portions lying in planes crossing theplane of rotation of the cutter-head, the inclined portions of onesection adapted to engage those of the other section, means forinterlocking the two sections, and means for indicating the adjustmentsof the sections, substantially as shown and described.

16. A cutter-head of the character stated comprising two sections,stepped inclines on the adjacent portions of the sections, said inclinesadapted to cooperate with one another to hold the sections at variousdistances from each other along the axial line of the cutterhead, meanscarried by the sections for interlocking them and means carried by thesections for indicating their adjustments, substantially as shown anddescribed.

FRANK D. HALL.

